2026-03-11 03:22:42 +00:00
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# MFA Commands Implementation Summary\n\n**Date**: 2025-10-09\n**Plugin**: `nu_plugin_auth`\n**Version**: 0.1.0\n**Status**: ✅ Complete and Functional\n\n---\n\n## Overview\n\nSuccessfully implemented MFA (Multi-Factor Authentication) commands for the `nu_plugin_auth` Nushell plugin, adding TOTP enrollment and verification capabilities with QR code generation.\n\n---\n\n## Implementation Details\n\n### Files Modified\n\n1. **`Cargo.toml`** (2 additions)\n - Added `totp-rs = { version = "5.7", features = ["qr"] }`\n - Added `qrcode = "0.14"`\n - Enabled `blocking` feature for reqwest: `features = ["json", "rustls-tls", "blocking"]`\n\n2. **`src/helpers.rs`** (+126 lines)\n - Added MFA request/response structs:\n - `MfaEnrollRequest`\n - `MfaEnrollResponse`\n - `MfaVerifyRequest`\n - Implemented MFA API functions:\n - `send_mfa_enroll_request()` - POST to `/mfa/enroll/{type}`\n - `send_mfa_verify_request()` - POST to `/mfa/verify`\n - Implemented QR code generation:\n - `generate_qr_code()` - Creates terminal-renderable QR codes\n - `display_qr_code()` - Displays QR with instructions\n - `extract_secret()` - Extracts TOTP secret from URI\n\n3. **`src/main.rs`** (+168 lines)\n - Added `MfaEnroll` command struct\n - Required parameter: `type` (totp or webauthn)\n - Named flags: `--user`, `--url`\n - Displays QR code for TOTP enrollment\n - Returns secret and backup codes\n - Added `MfaVerify` command struct\n - Named flags: `--code`, `--user`, `--url`\n - Verifies 6-digit TOTP codes\n - Returns validation status\n - Registered both commands in plugin\n\n4. **Bug Fixes**\n - Fixed keyring API: `delete_password()` → `delete_credential()` (keyring 3.x compatibility)\n\n---\n\n## New Commands\n\n### 1. `auth mfa enroll`\n\n**Purpose**: Enroll in MFA (TOTP or WebAuthn)\n\n**Syntax**:\n\n```bash\nauth mfa enroll <type> [--user <username>] [--url <control-center-url>]\n```\n\n**Parameters**:\n\n- `type` (required): MFA type - "totp" or "webauthn"\n- `--user` / `-u`: Username (defaults to current user)\n- `--url`: Control Center URL (default: <http://localhost:3000>)\n\n**Examples**:\n\n```bash\n# Enroll TOTP (Google Authenticator, Authy)\nauth mfa enroll totp\n\n# Enroll WebAuthn (YubiKey, Touch ID)\nauth mfa enroll webauthn\n\n# Enroll TOTP for specific user\nauth mfa enroll totp --user alice\n```\n\n**Output**:\n\n```nushell\n{\n success: true,\n mfa_type: "totp",\n secret: "JBSWY3DPEHPK3PXP",\n backup_codes: [\n "ABC123DEF",\n "GHI456JKL",\n ...\n ]\n}\n```\n\n**TOTP Enrollment Display**:\nWhen enrolling TOTP, displays:\n\n1. QR code in terminal (Unicode art)\n2. Scan instructions\n3. Manual secret entry alternative\n\n---\n\n### 2. `auth mfa verify`\n\n**Purpose**: Verify MFA code\n\n**Syntax**:\n\n```bash\nauth mfa verify --code <6-digit-code> [--user <username>] [--url <control-center-url>]\n```\n\n**Parameters**:\n\n- `--code` / `-c` (required): 6-digit TOTP code\n- `--user` / `-u`: Username (defaults to current user)\n- `--url`: Control Center URL (default: <http://localhost:3000>)\n\n**Examples**:\n\n```bash\n# Verify TOTP code\nauth mfa verify --code 123456\n\n# Verify TOTP code for specific user\nauth mfa verify --code 123456 --user alice\n```\n\n**Output**:\n\n```nushell\n{\n valid: true,\n message: "MFA verified"\n}\n```\n\n---\n\n## Technical Architecture\n\n### Request Flow\n\n```plaintext\n1. User executes command\n ↓\n2. Plugin retrieves access token from keyring\n ↓\n3. HTTP request to Control Center\n - Enroll: POST /mfa/enroll/{type}\n - Verify: POST /mfa/verify\n ↓\n4. Control Center processes MFA operation\n ↓\n5. Plugin receives response\n ↓\n6. Display QR code (TOTP enrollment only)\n ↓\n7. Return structured record to Nushell\n```\n\n### QR Code Generation\n\nThe plugin uses `qrcode` crate to generate terminal-renderable QR codes:\n\n- **Encoding**: Unicode Dense1x2 format (2 pixels per character)\n- **Colors**: Light background, dark foreground\n- **Fallb
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